Pathological echoic responses in a child: effect of environmental mand and tact control.
D002653:Child Behavior Disorders; D002675:Child, Preschool; D003216:Conditioning, Operant; D004454:Echolalia; D004777:Environment; D006801:Humans; D008297:Male; D012057:Reinforcement, Verbal; D013663:Teaching; D014705:Verbal Behavior